Printing-machine.



yPAT-EN'IED MAY 23, 1905.

W. SCOTT.

PRINTING MACHINE.

APPLIGATION FILED AUG. 2,1901.

No. 790,531. PATENTED MAY23,'1905.

` W. sooTT.

PRINTING MACHINE.

APPLICATION FILED AUG. 2,1901.

3 SHEETS-SHEET 2.

PATENTED MAY 23, 1905 W. SCOTT. Y PRINTING MACHINE.

I APPLICATION FILED' AUG. 2,1901.

3 SHEETS-SHEET 3 .MHH Il NIWIIIHI ing nvenor Bg my# w@ GltkornajPatented May 23, 1905.

PATENT OEEICE.

WALTER SCOTT. OF PLAINFIEIJD, NEW JERSEY.

PRINTING-MACHINE.

SPECIFICATION fOImng' part Of Iletters'Patent No. 790,531, dated May S,1905. i Application filed August 2, 1901. Serial No. 70,634.

To all. whom, it may concern.-

Be it known that I, WALTER SooTT, a citizen of the United States, and aresident of Plainfield, in the county of Union andv State of New Jersey,have invented certain new and useful Improvements in Printing-Machines,of which the following is a specification.

My invention relates generally to printingmachines, and more especiallyto the means which impart movement to the reciprocating bed carrying thetype.

This is a companion application to the one filed by me jointly withEugene W. Swindells on the-l5th day of April, 1901, and bearing SerialNo. 55,820, in which is shown a printing-machine whoseimpression-cylinder makes one revolution to each reciprocation of thetype-bed.

In the present application is shown a machine in which theimpression-cylinder makes two revolutions to each reciprocation, butwhich is otherwise, with the exceptions hereinafter noted, of the samegeneral construction as the machine shown in the application abovenoted.

The objects of this invention are the same as the objects of theinvention described in the companion application above named and may bebriefly stated to be the production of a superior reversing mechanismand the -reduction of the number of gears used between theimpression-,cylinder and the'type-bed.

I shall describe a printing-machine embodying my invention and afterwardpoint out the novel features in the claims.

In the drawings I have embodied my invention in a suitable mechanism, itbeing of course obvious that changes may be made within the scope of theclaims.

Figure l is a side View of a two-revolution printing-machine embodyingmyinvention, the type-bed being shown at the end of its reciprocation,parts being also omitted and indicated diagrammaticall y for the sakeofclearness. Fig. 2 is an end view of Fig. l looking in thedirection ofthe arrow z, the gear which operates the reciprocating bed being shownin mesh with the upper rack. Parts are also omitted in this view tofacilitate clearness of illustration. Fig. 3- is a detail view of the.bed racks, driving gear, and adjacent elements. Fig. 4: isa sectionaldetail view onl the line m of Fig. 1 and also looking in thedirection'of the arrow a, showing the means for rotating the gearengaging with the racks in a position corresponding to the position ofthe elements in Fig. 2. Fig. `5 is a detail view showing the means forvibrating the rackgear. Fig. 6 is a sectional view on the line y y ofFig. 3. 6o

Throughout the specification like characters of reference denotecorresponding elements. j

A represents the framework of the machine, on which is mounted onsuitable bearings c' 65 the impression-cylinder B, vibrated by means ofthe toggles Z/ once to every two revolutions inI a well-known manner.The type-bed C is mounted on frictional rollers c', which are carried byand slide upon the tracks c2; Un- 70 derneath the type-bed O and boltedto it is a rack-hanger G. On this rack-hanger are mounted the upper rackg and the lower rack g2 and further segmental racks g3 g and g4 g1". Oneach end of the'rack-hanger is also 75 a rigid shoe g5 and abearing-shoulder g, forming a slot curved to correspond with thepitch-line of the segmental-racks g3 and g4.

On the end of the shaft b2 of the impressioncylinder B is mounted alarge gear 3, under- 8O neath and engaging with which is mounted thegear D, supported on the bushing or fixed hub d', bolted to theframework and of a diameter properly proportioned to the diameter of thegear on the impression-cylindershaft. Adjacent to one side of the gear Dis the driving-pinion E, which is fastened to the driving-shaft e',which also carries the belt-pulleys e2 and e3, transmitting motion tothe machine.

The bushing d', on which the gear D rotates, is hollow and affords abearing for the eccentrically-located rock-shaft F, extending in towardthe center of the machine. This p eccentric rock-shaft F has aneccentric hole 95 f/ and is supported at its other end by the bearingf2. Inside the eccentric rock-shaft or sleeve Fis placed the shaft M,which of course thereby also becomes eccentric with relation to the gearD. On the shaft M is the IOO gear-wheel m, adapted to engage with theracks g' and g2. The gear m is preferably of a circumference equal tothe uniform travel of the bed in one direction. By this means the gearm/ makes three revolutions to each complete baek-and'forth movement ofthe bed. Fastened to one side of the gear m is the pinion m2. Thispinion m2 is preferably made of a diameter equal to one-half thediameter of the gear m plus one-half the distance which the said gearraises or lowers to engage and disengage with the racks g and g.Immediately adjacent to the pinion m2 is the circular bearer m3 of adiameter equal to the pitch-diameter of the pinion m2. On the gear m isalso placed a stud mi, on which revolves a friction-roll m5. This rollm5 is preferablT placed at one side of the pinion m2 and thecircularbearer m3 and at a point between their pitch-lines and centers,the preferred position being half-way. This position of the roll, as

pointed out in the companion application hereinbefore referred to, makesthe path of the roll such that it enables the said roll to engage withits corresponding element on the bed-in this ease the shoe g-aconsiderable length of time if the preponderance of pressure is in thatdirection. The result of this is that the said shoe g5 and the roll willcontrol the bed during its reversal. On the outer end of the shaft M isfastened an arm m6, carrying a guideway m7. The gear-wheel D carries apin d5, having a block d, which extends into the guideway m7, therebydriving the shaft M.

Inside the framework is mounted the cam R, having' the gear r'connecting, through the pinion r2 and the gear r3, with the gear D andgeared to make one revolution with' each reciprocation of the type-bedand with every two revolutions of the impression-cylinder. Fastened tothe framework is the crank-arm S, carrying the friction-rolls, adaptedto engage with the cam R. On the hollow eccentric shaft or sleeve F andintegral therewith or fastened thereto is an arm f5. This arm f5 and thecrank-arm S are connected by means of the connecting-rod s2, therebycausing the cam R to rock the eccentric rock-shaft F periodically.

The operation is as follows: When the end of the rack g2 approaches thepoint of contact with the gear m and is about to leave the same, thepinion m2 engages with the curved rack gg, continuing the forwardmovement until the rollm5 engages with the shoe g5. This roll m5engaging with the shoe g5 and the circular bearer m3 engaging with thebearingshoulder g control the endwise movement of the bed, pinion m2 andrack g3 continuing the movement until the gear m is in mesh with theupper rack g'. During this operation the gear m has changed its positionin contact with the rack g2 to a position in contact with the rack g bymeans of the shaft M, on which it is mounted, being` raised a sufiicientdistance by the movement of the eccentric rock-shaft or sleeve F,actuated by the cam R. When the other end of the rack g reaches the gearm', the operation is again repeated and the gear va lowered, so as todisengage with the rack g' and engage with the rack g2.

It is not essential that the pinion /a2 should be a complete gear whenseparate and disconnected raeks like g and y are used; but whenintern'iediate teeth are added, so as to keep the said pinion in meshall the way, it is of course necessary that it should be a completegear. The construction of the curved racks at the end with intermediateteeth added is not a necessity, but merely a matter of convenience tokeep the gear m2 in mesh all the way round. These intermediate teeth areindicated in dotted lines in Fig. 3 of the drawings. The exact shape ofthe segments at the end of the bed and auxiliary gear need, of course,not be followed. It is only necessary that the segments and the pinionshould be of a sufficient length and shape to engage with each otheruntil the bed has moved far enough to allow the roll mi and the bearerm3 to engage, respectively, with the shoe y and the shoulder g.Furthermore, as has been stated herein, the shaft M is eccentric withrelation to the gear D in the eccentric sleeve F in order that by theshifting of the said eccentric sleeve 4by the cam R it may be moved upand down to enable the gear 1a to engage with the upper and lower rackand at the same time be rotated by the said gear l); but when theeccentric sleeve F is moved to the position shown in Fig. 4 theeccentricallylocated shaft M is concentric with relation to the gear D.This oscillation of the eccentric sleeve F of course also changes theposition of the guide m7 with relation to the pin d, so that thedistance which the block d has to travel in a given time varies, therebycausing a variation in its speed` and consequently in the speed of theshaft M. When the shaft M is concentric with the gear D, the speed ofthe said shaft, and consequently of the bed, will be the same speed asthe speed of the impression-cylinder, and the elements must of course beso constructed or timed that the said shaft is in its concentricposition with relation tothe gear D when the machine is in the act ofprinting, so that the impressioncylinder and type-bed will move at thesame surface speed.

The diameter of the pinion m2 should he substantially one-half thediameter of the gear m' plus one-half the distance the said gear raisesand lowers. It could be larger or smaller than this relative to the gearm; but this construction is preferred, as it is thereby possible to makethe segmental racks appear as continuations of the straight racks, asshown in the drawings.

IOO

Having thus described my invention, what I claim is l. A Areciprocatingbed supporting two racks,two gear-segments at each end',twobearing-shoulders and two shoes forming two slots, in combination with adriving-gear toiengage alternately with the racks, an auxiliary gear toengage with the gearsegments,and a bearer and a roll to engagerespectively with the bearing-shoulders and with the shoes to reversethe motion of the bed, and to control it while turning.

2. The combination of a reciprocating bed supporting two racks, twogear-segments at each end,two bearing-shoulders and two shoes Jformingtwo slots, a driving-shaft having thereon a gear to engage with theracks, an auxiliary gear to engage with the gear-segments, a bearer anda roll to engage respectively with the bearing-shoulders and with theshoes to reverse the motion of the bed, and to control it while turning,and means for raising and lowering the shaft after the end's of theracks have reached the gear.

3. The combination of a frame carrying two racks, two gear-segments ateach end, two

bearing-shoulders and two shoes forming twol slots, a driving-gearcaused to engage alternately with the racks, an auxiliary gear of alesser diameter attached to the driving-gear to engage with thesegments, and a bearer and a roll, the latter placed a distance insidethe pitch-lineof the auxiliary gear, to engage respectively with thebearing-shoulders and with the shoes to reverse the motion of the bed,and to control it while turning.

4. The combination of a frame carrying two racks, two gear-segments ateach end, two bearing-shoulders and two shoes forming two slots, adriving-gear caused to engage alternately with the racks, an auxiliarygear or gear-segment of a diameter somewhat greater than the radius ofthe driving-gear attached to the latter and adapted to engage with thesegments, and a bearer, of the same diameter as the auxiliary gear, anda roll, placed at a point intermediate the center and the pitchline ofthe auxiliary gear, to Vengage respectivelywith the bearing-shouldersand with the shoes to reverse the motion of the bed, and to control itwhile turning.

5. The combination of aframe carrying two racks, two gear-segments ateach end, two

bearing-shoulders and two shoes forming two slots, a driving-gear causedto engage'alternately with the racks, means for raising and lowering thedriving-gear after the ends of the racks have reached the said gear, anauxiliary gear or gear-segment of a diameter equal to one-half thediameter of the drivinggear plus substantially one-half the distance thesaid gear is raised or lowered carried by the said driving-gear toengage with the segments, and 'a bearer, of the same diameter as theauxilary gear7 anda friction-roll, carried inside of the pitch-line ofthe auxiliary gear, to engage respectively with the bearing-shouldersand with the shoes, to reverse the motion of the bed, and to control itwhile turning.

6. rlhe combination of a frame carrying two racks, two gear-segments ateach end, two bearing-shoulders and two shoes forming two slots, adriving-gear caused to engage alternately with the racks, an auxiliarygear of a lesser diameter attached to the driving-gearto engage with thesegments, and a bearer and a roll, the latter carried at a pointsubstantially half-way between the pitch-line and the center of theauxiliary gear, to engage respectively with the bearing-shoulders andwith the shoes to reverse the motion of the bed, and to control it whileturning.

7. The combination of a frame carrying two racks, two gear-segments ateach end, two bearing-shoulders and two shoes forming two slots, adriving-gear caused to engage alternately with the racks, means forraising and lowering the driving-gear after the ends of ,the racks havereached the said gear, an auxiliary gear or gear-segment of a diameterequal to one-half the diameter of the operating-gear plus substantiallyone-haltl the distance the said gear is raised or lowered carried by thesaid driving-gear to engage with the segments, and a bearer and afriction-roll, the latter carried at a point substantially half-waybetween the pitch-line and the center of the said auxiliary gear, toengage respectively with the bearing-shoulders and with the shoes toreverse the motion of the bed, and to control it while turning. 4

8. The combination of a frame carrying two racks, two gear-segments ateach end, two

lbearing-shoulders and two shoes forming two slots, a driving-gearcaused to engage alternately with -the racks, an auxiliary gear of alesser diameter attached to the .driving-gear to engage with thesegments, a bearer anda roll, the latter placed a distance inside of thepitch-line of the auxiliary gear, to engage respectively with thebearing-should ers and with the shoes to reverse the motion of the bed,and to control it while turning, and means to raise and lower thedriving-gear after the ends of the racks have reached the said gear.

9. The combination of a frame carrying two racks, two gear-segments ateach end, two

bearing-shoulders and two shoes forming two slots, a driving-gear causedto engage alternately with theracks, an auxiliary gear of a lesserdiameter attached to the driving-gear to engage with the segments, abearer and a roll, the latter placed at a point intermediate the centerand the pitch-line of the auxiliary gear, to engage respectively withthe bearingshoulders and with the shoes to reverse the .motion of thebed, and to control it while turning, and means to raise and lower thedrivinggear after the ends of the racks have reached the said gear.

11. The combination of a frame carrying two racks, two gear-segments ateach end, two bearing-shoulders and two shoes forming two slots, anauxiliary gear or gear-segment of a diameter somewhat longer than theradius of the driving-gear attached to the latter toengage with thesegments, a bearer and a roll, the latter of which is placed at a pointintermediate the center and pitch-line of the auxiliary gear, to engagerespectively with the shoes to reverse the motion of the bed, and tocontrol it while turning, and means to raise and lower the driving-gearafter the ends of the racks have reached the said gear.

12. rlhe combination of a reciprocatingv body, an upper and lower rackon same, a driving-gear adapted to engage alternately with said racks toreciprocate the body, a bearing-shoulder and a rigid shoe at each end ofthe racks forming a slot, a bearer and a friction-roll carried by thegear adapted to engage respectively with the bearing-shoulders and theshoes to reverse the motion of the bed, and to control it while turning,two rack-seg- Y ments at each end carried by said body, and

an auxiliary gear or segment carried by the driving-gear adapted tocoact with the said rack-segments after the racks disengage thedriving-gear and before the roll engages the shoes or vice versa.

13. The combination of a gear-wheel, a bushing forming a hub or shaftfor the said gear-wheel, a rock-shaft located eccentrically in saidbushing and having a longitudinal eccentric hole, a rotatable shaftresting therein, a guide on the end of the rotatable shaft and an armcarrying a block on the gear-wheel adapted to engage with the guide toimpart the motion of the gear to the rotatable shaft.

14C. The combination of a gear-wheel, a bushing forming a hub or shaftfor the said gear-wheel, a rock-shaft located eccentrically cratedperiodically by the movement of the cam.

15. ln a printing-machine, the combination of an impression-cylindermaking two revolutions to each impression, a reciprocating type-bed, arock-shaft, an eccentrically-located rotatable shaft resting in saidrockshaft, means for operating the reciprocating bed from the rotatableshaft, a gear mounted on a lixed hub at the end ol the rock-shaft andeccentrically thereto imparting motion to the impression-cylinder and tothe rotatable shaft, a cam making one revolution to each im pression,and means operated by said cam for rocking the shaft periodically.

16. In a 1in'inting-machine, the combination of an ilnl'nession-cylindermaking two revolutions to each impression, a reciprocating type-bed, arock-shaft, an eccentrically-located rotatable shaft resting in saidroekshaft, means for operating the reciprocating` bed from the rotatableshaft, a gear mounted on a lixed hub at the end ol the rock-shaft andeccentrically thereto imparting motion to the impression-cylinder andto" the rotatable shaft, a cam making one revolution to each impression,suitable gearing connecting lsaid cam with the gear on the hub, andmeans operated by said cam for rocking the shaft periodically.

17. In a printing-maehine, the combination of an impression-cylindermaking two revolutions to each impression, a reciprocating type-bed, arock-shaft, an eccentrically-located rotatable shaft resting in saidrockshaft, means for operating the reciprocating bed from the rotatableshaft, a gear mounted on a lixed hub at the end of the rock-shaft andeccentricall y thereto imparting motion to the impression-cylinder andto the rotatable shaft, a cam located inside the framework and makingone revolution to each impression, suitable gearing connecting said camwith the gear on the hub, and means operated by saidl cam for rockingthe shaft periodically.

18. In a printing-machine, the combination of a reciprocating typebedcarrying two racks, two rack-segments at each end, two bearing-shouldersand two rigid shoes forming two slots, a drivinggear for engaging withthe racks carrying an auxiliary gear lor engaging with the segments, abearer for engaging with the bearing-shoulders, and a roll for engagingwith the slices, the coperation of the said bearer and roll with thesaid bearing-shoulders and slices reversing the motion of the bed andcontrolling it while turning, a rotatable shaft mounting saiddrivinggear, a rock-shaft having a longitudinal eccentric hole, therotatable shaft resting in said hole, and means for periodicallyoperating the rock-shaft to raise and lower the rotatable shaft afterthe ends of the racks have reached the driving-gear.

lof

19. In a printing-machine, 'the combination of a reciprocating type-bedcarrying two racks, two rack-segments at each end, two bearing-shouldersand two rigid shoes forming two slots, a driving-gear for engaging withthe racks lcarrying an auxiliary gear for engaging with the segments, abearer for engaging with the bearing-shoulders, and a roll for engagingwith the shoes, the cooperation of the said bearer and roll with thesaid bearing-shoulders and shoes reversing the motion of the bed andcontrolling it while turning` a rotatable shaft mounting saiddriving-gear, a rockshaft having a longitudinal eccentric hole, therotatable shaft resting in said hole, and means for periodicallyoperating the rockshaft to raise and'lower the rotatable shaft after thedriving-gear is disengaged'from the upper or lower rack. A

20. In a printing-machine, the combination of a reciprocating type-bedcarrying ,two racks, two rack-segments at each end, twobearing-shoulders and two rigid shoes form ing two slots, a driving-gearfor' engaging with the racks carrying an auxiliary gear for engagingwith the segments, a bearer for engaging with'the bearing-shoulders, anda roll for engaging with the shoes, the cooperation of the said bearerand roll with the said bearing-shoulders and shoes reversing the motionof the bed and controlling it while turning, a rotatable shaft mountingsaid driving-gear, a rock -shaft having a longitudinal eccentric hole,the rotatable shaft resting in said hole, and means for periodicallyoperating the rockshaft to raise and lower the rotatable shaft while themotion of the bed is being reversed.

2l. In a printing-machine, the combination of a reciprocating type bedcarrying two racks, two rack-segments at each end, two bearing-shouldersand two rigid shoes forming two slots, a driving-gear for engaging withthe racks carrying an auxiliary gear for engaging with the segments, abearer for engaging with the bearing-shoulders, and a roll for engagingwith the shoes, the cooperation of the said bearer and'roll with thesaid bearing-shoulders and shoes reversing the motion of the bed andcontrollingit while turning, a rotatable shaft mounting saiddriving-gear, a rock shaft having a longitudinal eccentric hole, therotatable shaft resting in said hole, means for periodically operatingthe rockshaft to raise and lower the rotatable shaft after thedriving-gear is disengaged from the upper or lower rack,la gear mountedon a fixed hub at the end of the rock-shaft and ec.

centrically thereto, and means for operating the rotatable shaft fromsaid gear.

22. In a printing-machine, the combination of a reciprocating type-bedcarrying two racks, two rack-segments at each end, two

bearing-shoulders and two rigid shoes form-- ing two slots, adrivinggear forengaging with the racks carrylng an auxiliary gear forengaging with the segments, a bearer for engaging with thebearing-shoulders, and a roll for engaging with the shoes, thecooperation of the said bearer and roll with the said bearing-shouldersand shoes reversing the motion of the bed and controlling it whileturning,

a rotatable shaft mounting said driving-gear,

a rock-shaft having a longitudinal eccentric hole, the rotatable shaftresting in said hole, a gear mounted on a fixed hub at the end of therock-shaft and eccentrically thereto, an impression-cylinder making tworevolutions to each impression meshing with said gear on the hub, andmeans for operating the rotatableA shaft from the gear on the hub.

23. In a printing-machine, the combination .of a reciprocating type-bedcarrying two racks, two rack-segmentsat eachv end, two bearing-shouldersand two rigid shoes forming two slots, a driving-gear for engaging' withthe racks carrying an auxiliary gear for engaging with .the segments, abearer for engaging with the bearing-shoulders, and a roll for engagingwith the shoes, the cooperation of thesaid .bearer and 4roll with thesaid bearing-shoulders and shoes reversing the motion of the bed andcontrolling it while turning, a rotatable shaft mounting' saiddriving-gear, a rock-shaft having a longitudinal eccentric hole, therotatable shaft resting in said hole. a gear mounted on a fixed hub atthe end of the rock-shaft and eccentrically thereto, animpression-cylinder making two revolutions to each impression having agear meshingA with the gear on the hub, means for operatingl therotatable shaft from the gear on the hub, and a cam making onerevolution to each impression for operating the rock-shaft to -catedintermediate the main racks and the shoes, and an auxiliary gear carriedby the driving-gear to engage with the curved racks.

25. A reciprocating bed supporting two main racks, two bearing-shouldersand two shoes forming two slots, in combination with a driving-geararrangedto engage alternately with 'the main racks to reciprocate thesaid bed, and a bearer and a roll to engage respectively with thebearing-shoulders and with the shoes to reverse the motion of the bed,and to control it while turning, curved racks located intermediate themain racks and the shoes, intermediate teeth connecting the curved racksat each end, and an auxiliary gear carried by IOO the driving-gear toengage with the curved racks.

26. The combination of a reciprocating body carrying two main racks, twobearingshoulders and two shoes forming two slots,\a driving-shaft havingthereon a driving-gear to engage with the main racks to reciprocate thesaid body and a bearer and a roll to engage respectively with thebearing-shoulders and with the shoes to reverse the motion of thebed,and to control it while turning, curved racks located intermediatethe main racksl and the shoes, an auxiliary gear carried by thedriving-gear to engage with the curved racks, and means to raise andlower the shaft after the ends of the racks have reached thedriving-gear.

27. The combination of a reciprocating body carrying two main racks, twobearing- Shoulders and two shoes forming two slots, a driving-shafthaving thereon a driving-gear to engage with the main racks toreciprocate the said body and a bearer and a roll to engage respectivelywith the bearing-shoulders and with the shoes to reverse the motion ofthe bed,and to control it while turning, curved racks locatedintermediate the main racks and the slices, intermediate teethconnecting the curved racks at each end, an auxiliary gear carried bythe driving-gear to engage with the curved racks, and nieans to raiseand lower the Shaft after the ends of the racks have reached thedriving-gear.

28. The combination of a reciprocating body, an upper and a lower rackon same, a driving-gear adapted to engage alternately with the saidracks to reciprocate the body, a bearing-shoulder and a Shoe at each endof the racks forming a slot, a bearer and a roll carried by the gearadapted respectively to engage therewith to reverse thev motion of thebed, and to control it while tu rning,l two racksegments at each endcarried by said body located intermediate the racks and the shoes,intermediate teeth connecting the rack-segments at each end, and anauxiliary gear carried by the driving-gear adapted to coact with thesaid rack-segment to continuol the movement of the bed after the racksdisengage thel driving-gear and before the roll engages the shoes orvice versa.

Signed at New York, in the county oi" New York and State of New York,this 3d day of July, A. D. 1901.

' VALTER SCOTT. Witnesses:

AXEL V. Banken, ARTHUR L. HELMES.

